US Bridges

US 385 Ml over Smokey Hill River

Fair

Kit Carson County, Colorado · 15 MI S of Burlington · Structure no. H-27-C

Built
1954
71 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
153 ft
5 main spans
Daily traffic
720
2020 count
Owner
State
State Highway Agency

About this bridge

US 385 Ml over Smokey Hill River is a concrete tee beam carrying US 385 Ml over Smokey Hill River in Kit Carson County, Colorado. It was built in 1954, so it is 71 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 720 vehicles a day, roughly 27% of them trucks, projected to reach 929 by 2040. The structure is 153 ft (46.5 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS 385 Ml
CrossesSmokey Hill River
Location15 MI S of Burlington
RouteU.S. Route 385C
Coordinates39.08153, -102.27887
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.1 US tons
Inventory rating35.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length153 ft (46.5 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2020)
Projected traffic929 by 2040
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 385 Ml over Smokey Hill River built?

It was built in 1954, making it 71 years old in 2025.

What condition is US 385 Ml over Smokey Hill River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does US 385 Ml over Smokey Hill River carry?

About 720 vehicles per day (2020 count), of which roughly 27% are trucks.

How long is US 385 Ml over Smokey Hill River?

The structure is 153 ft (46.5 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns US 385 Ml over Smokey Hill River?

It is owned by the State Highway Agency.